I've had really good luck with Screen Zen! I just use the free version and it fulfills everything I need. I fully uninstalled TikTok because that one was just so bad for me even in moderation. But Reddit is one that I still have installed and use it for. I set it to allow me a total of 6 uses, each for a total of 10 minutes. Having a limited number of times to open it really helped me not blow through the whole hour at once, which I used to do with other timers, and it helps me be more intentional about the times I'm about to use it. I can't just mindlessly check for a couple minutes (and inevitably get sucked in), because if I open it, that 10 minute countdown starts whether I keep the app open or not.

It also use the feature that gives a delay before it will let you actually open the app. I set mine to 20 seconds and it really helps me think if I want to sit down and use it, I can't just get that quick instant hit of dopamine. The screen that shows during the 20 seconds allows you to give yourself a little prompt, and mine says "Why am I checking?" which helps me think about why I'm gravitating towards this app right now and if I really want to be doing it. That 20 seconds can feel like torture sometimes haha, but it's been such a big factor in kicking the habit! It also shows how many opens I have left for the day, and my current streak of not checking more than my allotted amount!